Patent EP-2057928-A2 (EP)
Inventor: PEUKERT THOMAS DR ING
IPC: H01L35/30
Filed: 2008-10-10
Abstract: The device (110) for cleaning of product (114) e.g. table-ware or glasses with a cleaning fluid in a cleaning chamber (118), comprises a device (154) for the suction of moist air from the cleaning chamber, a device (152) for the recovery of heat from the moist air and for supplying heat to the cleaning device via a first cooling fluid, and a cooling fluid line comprising a feedback path and a heat storage path with a latent heat storage. The suction device comprises an outlet (160) for discharging the sucked moist air from the cleaning device through the heat recovery device. The device (110) for cleaning of product (114) e.g. table-ware or glasses with a cleaning fluid in a cleaning chamber (118), comprises a device (154) for the suction of moist air from the cleaning chamber, a device (152) for the recovery of heat from the moist air and for supplying heat to the cleaning device via a first cooling fluid, and a cooling fluid line comprising a feedback path and a heat storage path with a latent heat storage. The suction device comprises an outlet (160) for discharging the sucked moist air from the cleaning device through the heat recovery device. The first cooling fluid in an operating condition is led to the cleaning chamber and/or into a fluid tank after flowing through the heat recovery device via the feedback path. The first cooling fluid in a standby mode is supplied to the latent heat storage via the heat storage path. The latent heat storage is a multi-stage latent heat storage with two transition temperatures, comprises heat storage materials and has the transition temperature of 70[deg] C. The cleaning device includes an electronic control device for operating the device in the standby-mode and in an operating condition. The heat storage path is arranged as closed circuit, in which the first cooling fluid circulates between the heat recovery device and the latent heat storage in the standby-mode. A transitional phase is introduced after the standby-mode, in which the heat stored in the latent heat storage is totally or partly transferred to the cleaning chamber and/or into the fluid tank. The heat storage path comprises a pump for feeding the first cooling fluid. The heat recovery device comprises a thermoelectric heat pump and/or a thermo-mechanical heat pump. The thermoelectric heat pump has a Peltier element, which comprises a heat reception side and a waste heat side, which is thermally connected with a fluid heating device, by which the first cooling fluid is flowed. The heat recovery device comprises a first fluid heat exchanger to extract a first amount of heat from the moist air, and a second fluid heat exchanger. The heat reception side of the Peltier elements extracts a second amount of heat from the moist air. The first cooling fluid is flowed through the first fluid heat exchanger and then flows through the fluid heating device. The first fluid heat exchanger comprises an open cooling fluid line for the first cooling fluid. An out-flow arranged in the first fluid heat exchanger is connected to the cooling fluid line with the fluid heating device. An inflow end is connected to the cooling fluid line with a cold-water connection. A second cooling fluid flows through the second fluid heat exchanger and is thermally connected with the heat reception side of the Peltier elements. The second fluid heat exchanger comprises a heat exchanger circuit for the second cooling fluid, and a heat exchanger area, which is thermally connected with the moist air. The Peltier elements are arranged in Peltier stacks in a cascade-like manner with the heat reception side and the waste heat side. The Peltier stacks are combined to a Peltier module. The heat exchange areas are present between the Peltier stacks. A first heat exchange area is thermally connected with two waste heat sides of the Peltier stack. A second heat exchange area is thermally connected with two heat reception sides of the Peltier stack. The first and/or second heat exchange areas comprise a cavity for the first cooling fluid. The heat recovery device comprises another electronic control device for controlling and/or regulating a cooling performance of the Peltier elements. The fluid tank comprises a boiler and/or a flow heater. The cleaning device includes a tape transporting machine and/or a basket transporting machine, a chamber dishwasher with a fluid tank separated by the cleaning chamber, a steam disinfection device, and a steam sterilizer. The dishwasher has a cleaning zone in a flow-direction for the product to be cleaned. The cleaning zone comprises a clear rinsing area with a clear rinsing tank. The first cooling fluid is led into the clear rinsing tank after flowing through the fluid heating device. An independent claim is included for a method for the heat recovery in a cleaning device.